#include <REGX52.H>
#include <INTRINS.H>
void Delay1ms(int xms)		//@12.000MHz
{
	unsigned char i, j;
	while(xms){
			i = 2;
		j = 239;
		do
		{
			while (--j);
		} while (--i);
		xms--;
	}
}
void main(){
	while(1){
	P2 = 0x7F;//0111 1111
	Delay1ms(200);
	P2 = 0xBF;//1011 1111
	Delay1ms(200);
	P2 = 0xDF;//1101 1111
	Delay1ms(200);
	P2 = 0xEF;//1110 1111
	Delay1ms(200);
	P2 = 0xF7;//1111 0111
	Delay1ms(200);
	P2 = 0xFB;//1111 1011
	Delay1ms(200);
	P2 = 0xFD;//1111 1101
	Delay1ms(200);
	P2 = 0xFE;//1111 1110
	Delay1ms(200);
}
}